All available functions of mobile phone (such as QQ, SMS, etc.). ).

Bluetooth;

Bluetooth headset;

MP3

MP4

Photography (including front and back);

Film recording and broadcasting;

Recording;

Wireless internet access;

Wired download;

Memory expansion and upgrade;

MMS;

Word dictionary;

Games (including stand-alone games and online games);

Call language prompt;

Calendar;

Currency conversion;

Charging and time prompt function

3G mobile phone, that is, the third generation mobile phone, generally refers to a new generation mobile communication system that combines wireless communication with multimedia communication such as the Internet. It can handle images, music, video streams and other media forms, and provide a variety of information services including web browsing, teleconference, e-commerce and so on. In order to provide this service, the wireless network must be able to support different data transmission speeds, that is, in indoor, outdoor and driving environments, it can support at least 2Mbps (megabits per second), 384kbps (kilobytes per second) and 144kbps respectively.

What's the difference between 3G mobile phones and the mobile phones used now? What are the functions?

3G mobile phone is the product of the integration of communication industry and computer industry, and it is a mobile phone with 3G network skills. Compared with the mobile phone in our daily life, it is very different, so more and more people begin to call this new mobile communication product "personal communication terminal".

Many people think that 3G mobile phones are smart phones, but they are not. Smartphone generally refers to a mobile phone with PDA function, so don't confuse the two.

Even the most layman in the communication industry can easily judge whether a mobile phone is the "third generation" from its appearance: the third generation mobile phones have a large color display screen, which is often touch-sensitive. 3G mobile phone can not only complete high-quality daily communication, but also carry out multimedia communication. Users can write and draw directly on the touch screen of 3G mobile phone and send it to another mobile phone, which may take less than one second. Of course, you can also send this information to the computer or download some information from the computer; Users can use 3G mobile phones to surf the Internet directly, check emails or browse the web. There will be many models of 3G mobile phones with their own cameras, which will allow users to hold computer meetings with their mobile phones and even make digital cameras "redundant".

With 3G mobile phones, users can handle images, music, video streams and other media forms, provide various information services including web browsing, teleconference and e-commerce, and support video calling, mobile TV, video on demand, MP3 download, online games, location services, wireless Internet access, mobile storage and video conferencing. In order to provide these services, wireless networks must be able to support different data transmission speeds, that is, in indoor, outdoor and driving environments, they can support at least 2Mbps (megabits per second), 384kbps (kilobytes per second) and 144kbps respectively. Most 3G mobile phones are compatible with the 2G and 2.5G networks we are using now.

Most 3G mobile phones are compatible with the 2G and 2.5G networks we use now.

What's the difference between 3G mobile phone and tri-band mobile phone?

Tri-band mobile phones, mostly GSM mobile phones, can switch freely in three frequency bands of GSM 900 \ GSM1800 \ GSM1900 without using CMDA network, which means that a mobile phone can travel around the world.

Here is a supplementary explanation of GSM for readers.

The full name of GSM is Global System for Mobile Communications, and Chinese is Global System for Mobile Communications, commonly known as "GSM". It is a technical standard of mobile communication originated in Europe, and it is the second generation of mobile communication technology. Its development purpose is to enable all parts of the world to use the same mobile phone network standard, so that users all over the world can use a mobile phone. China introduced this technical standard in the early 1990s, and has been using cellular analog mobile technology, that is, the first generation of GSM technology (China closed the analog mobile network on February 3, 20061day). At present, China Mobile and China Unicom each have a GSM network, which is the largest mobile communication network in the world.

The GSM system includes GSM 900:900MHz, GSM 1800: 1800 MHz and GSM- 1900: 1900 MHz. GSM series mainly includes GSM900, DCS 1800 and PCS 1900. The main difference between them is the difference of working frequency band.

At present, the two main GSM standards in China are GSM 900 and GSM 1800. Because the frequencies used are different, the applicable mobile phones are different. But at present, most mobile phones are basically dual-band mobile phones, which can be switched freely between these two frequency bands. In addition to GSM900 and GSM 1800, GSM 1900 has been added to the systems widely used in European countries, and the mobile phone is a tri-band mobile phone.

Is there no 3G network available for 3G mobile phones at present?

If it's a pure 3G mobile phone, it can't be used, but you can use basic call and SMS functions.

If it is a GSM/WCDMA dual-mode mobile phone, it can be used on GSM.

Here, there is also the question of frequency. WCDMA uses a frequency of 2. 1GHz. WCDMA mobile phones are generally dual-mode, which can support GSM 900/1800/1900 MHz and WCDMA 2. 1GHz. At present, domestic GSM uses 900/ 1800MHz.

smartphone

1, which has all the functions of an ordinary mobile phone, and can be used for normal mobile phone applications such as calling and texting.

2. Have wireless Internet access capability, that is, support GPRS under GSM network or CDMA 1X or 3G network under CDMA network.

3. It has the functions of PDA, including PIM (Personal Information Management), schedule, task arrangement, multimedia application and web browsing.

4. Have an open operating system. On this operating system platform, more applications can be installed, so that the functions of smart phones can be expanded infinitely.

Since only mobile phones with operating systems can be called smart phones, what are the types of operating systems? Since the birth of smart phone is related to PDA, its operating system will certainly be related to PDA. Symbian and Windows CE, Palm and Linux are still the four camps. However, unlike Palm and Windows CE competing for hegemony on PDA operating system, Symbian has taken the lead in smartphone operating system, and Sony Ericsson, Nokia, Motorola and Panasonic basically adopted Symbian-based operating system.

Symbian:Symbian is very similar to the combination of Windows and Linux. It has a good interface, adopts the technology of separating the kernel from the interface, has low hardware requirements, and supports C++, VB and J2ME. Poor compatibility. Representative model: Nokia 6600 Sony Ericsson P908 Siemens SX 1

WINDOWS CE: Due to the powerful strength of Microsoft, Windows CE has many inherent advantages, such as powerful built-in software, such as Word, Excel, IE, MSN Messenger, Outlook, Media Play and so on. It is difficult for similar software on other systems to be so perfectly unified. Due to the extremely high hardware requirements and high price, the power consumption is still very large and the system stability is poor. Representative model: dopod smart phone series.

Palm: This system doesn't require much hardware, so it can be well controlled in price and consumes little power. PALM appeared earlier, but there are still many imperfections in its application in mobile phones. Like the other two systems, PALM is weak. Representative model: Samsung SGH-i500Treo 600.

Linux:Linux has many advantages, such as open source code, low cost of software licensing, rich human resources for application development, and convenient development of personal and industrial applications. Starting too late, there is no solid foundation. Representative models: Motorola A760, Samsung i5 19.

Besides these four operating systems, have you heard of other operating systems such as S60 and S70? What are these? Actually, these are all branches of Symbian. Why do you say that? It turns out that Symbian OS is just the kernel of an operating system, and the interface can be developed by various manufacturers themselves. The interfaces of 92 10 and 3650 are different, and P908 and 6600 are different. 6600 uses 60 series interface, and P908 uses UIQ interface, which also leads to the program can not be universal because of subtle differences. Even Symbian OS 6.0 of 92 10 and 6. 1 of 3650 are mostly incompatible because of interface problems. I think we need to wait a few days to solve this problem. In different interfaces, there are different advantages and disadvantages. 60 series is easy to operate, and it is easy to switch off tasks, while UIQ interface can support handwriting operation and has more functions, but it is more troublesome to switch off tasks.